YUEN H T, DANIEL J C, TERENCE A K . High power 1.9 μm Tm3+- silica fiber laser pumped at 1.9 μm by a Yb3+-silica fiber laser [J]. Opt Comm, 2004, 231(1–6): 357–364. [2] WU J, JIANG S, LUO T, et al. Efficient thulium-doped ～2 μm germanate fiber laser [J]. IEEE Photonics Technol Lett, 2006, 18(2): 334– 336. [3] LI F, JING W, QIANG T, et al. Optical properties of Tm3+-doped novel oxyfluoride glass [J]. J Lumine, 2007, 124(2): 187–194. [4] GHISHLER C, LUTHY W, MOREL, et al. A Tm3+ sensitized Ho3+ silica fiber at 2.04 μm pumped at 809 nm [J]. Opt Commun, 1994, 109(3/4): 279–281. [5] KYUNGHWAN O H，MORSE T F, KING T A, et al Continuous-wave oscillation of thulium-sensitized holmium-doped silica fiber laser [J]. Opt Lett, 1994, 109: 279–281. [6] GHISLER C, LUTHY W, WEBER H P. Tuning of a Tm3+:Ho3+ silica fiber laser [J]. IEEE J Quantum Electron, 1995, 31(11): 1877–1879. [7] BALDA R, LACHA L M, et al. Optical spectroscopy of Tm3+ ions in GeO2–PbO–Nb2O5 glasses [J]. Opt Mater, 2005, 27(11): 1771–1775. [8] 祁长鸿, 张秀荣, 胡和方. 氟锆酸盐玻璃中Ho3+的光谱特性[J]. 光学学报, 1994, 14(6): 583–588. QI Changhong, ZHANG Xiurong, HU Hefang. Acta Opt Sin(in Chinese), 1994, 14(6): 583–588. [9] JUDD B R. Optical absorption intensities of rare earth ions [J]. Phys Rev, 1962, 127(3): 750–761. [10] OFELT G S. Intensities of crystal spect ra of rare earth ions [J]. Chem Phys, 1962, 37(3): 511–520. [11] SPECTOR N, REISFELD R, BOEHM L. Eigenstates and radiative transition probabilities for Tm3+ (4f12) in phosphate and tellurite glasses [J]. Chem Phys Lett, 1977, 49(1): 49–53. [12] MCCUMBER D E. Theory of phonon-terminated optical masers [J]. Phys Rev, 1964, 134(2A): 299–306. [13] ZOU X L, IZUMITANI T. Spectroscopic properties and mechanisms of excited state absorption and energy transfer upconversion for Er3+-doped glasses [J]. Non-Cryst Solids, 1993, 162(11/12): 68–80. [14] PENG B, IZUMITANI T. Optical properties,fluorescence mechanisms and energy transfer in Tm3+, Ho3+ and Tm3+-Ho3+ doped near-infrared laser glasses, sensitized by Yb3+ [J]. Opt Mater, 1995, 4(6): 797–810. [15] ZOU X, TORATANI H. Spectroscopic properties and energy transfers in Tm3+ singly and Tm3+/Ho3+ doubly-doped glasses [J]. J Non-Cryst Solids, 1996, 195: 113–124. [16] 李毛和, 祁长鸿, 林凤英, 等. 氟化物玻璃中Tm3+离子敏化Ho3+离子的红外发光性质[J]. 光学学报, 1998, 18(10): 1454–1458. LI Maohe, QI Changhong, LIN Fengying, et al. Acta Opt Sin(in Chinese), 1998, 18(10): 1454–1458. [17] CHO D H, CHOI Y G, KIM K H. Improvement of 4I11/2→4I13/2 transition rate and thermal stabilities in Er3+-doped TeO2–B2O3(GeO2) ZnO– K2O glasses [J]. ETRI J, 2001, 23(4): 151–156.
